How to add external library in IntelliJ IDEA?

Question

I am trying to add external library (places it in the /libs directory) to my project. When I try to use the methods from that library, I see that they are in red color which means that the library is not recognized. When I click Ctrl+B, I get a message "Cannot find declaration to go to".

I use these steps to add a library (JAR file): 1. copy the library file into /libs dir 2. open Project Structure -> Global Libraries -> Attach clases 3. find the library and click ok

Is this proper way to do it?

PS. I am trying to add AdMob .jar file this way.

Answer 1

Easier procedure on latest versions:

• Copy jar to libs directory in the app (you can create the directory it if not there)
• Refresh project so libs show up in the structure (right click on project top level, refresh/synchronize)
• Expand libs and right click on the jar
• Select "Add as Library"

Done